327 flywheel
Thread Starter
Racer
Joined: Jan 2012
Posts: 418
Likes: 1
From: Vic
327 flywheel
Been chasing an engine vibration for a while, comes down to a very shoddily balanced flywheel and clutch assembly . The flywheel is very ratty so I'm going to replace it. Am thinking of going steel/billet and slightly lighter on the flywheel , my car has really tall gearing, its either 3.08 or 3.36 on a manual 327 fresh standard engine.
Anyone had any experience with the lightened flywheels and the affect they have in getting the car off the line.
Geoff
Anyone had any experience with the lightened flywheels and the affect they have in getting the car off the line.
Geoff
Le Mans Master
Joined: Nov 2008
Posts: 5,691
Likes: 12
From: columbus oh
Been chasing an engine vibration for a while, comes down to a very shoddily balanced flywheel and clutch assembly . The flywheel is very ratty so I'm going to replace it. Am thinking of going steel/billet and slightly lighter on the flywheel , my car has really tall gearing, its either 3.08 or 3.36 on a manual 327 fresh standard engine.
Anyone had any experience with the lightened flywheels and the affect they have in getting the car off the line.
Geoff
Anyone had any experience with the lightened flywheels and the affect they have in getting the car off the line.
Geoff
if you indeed have a 3:08 i would stay with the stock weight flywheel especially with a "standard engine"....whatever that means
also it would be most helpful to know if a close ratio or wide trans.
if indeed it is a low horse mill you would want inertia from the heavier wheel for driver comfort for street use....
i really like light flywheels for most applications, however this may not be one......jmo.....
Team Owner
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From: Washington Michigan
Melting Slicks
Joined: Nov 2004
Posts: 2,311
Likes: 223
From: Temecula CA
On my recent 327/365/CR/3.70:1 build, the flywheel weight choice had me going back and forth.
Finally decided on the RAM 1511 which is SFI approved, billet steel and a little lighter at 26#.
So far, I'm lovin' it.
Finally decided on the RAM 1511 which is SFI approved, billet steel and a little lighter at 26#.
So far, I'm lovin' it.
Melting Slicks
Joined: Oct 2002
Posts: 2,317
Likes: 111
From: St Louis MO
Although I like and recommend lighter flywheels, the key determinant is the total gear multiplication ratio. If first gear times the rear end ratio is low numerically (like 8:1), a heavier/larger flywheel will help with starting from a stop. On the other hand, if you have >9.5:1, go with the lighter/smaller flywheel and enjoy the quicker performance!
Thread Starter
Racer
Joined: Jan 2012
Posts: 418
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From: Vic
Thanks for the help guys, the engine is 300 Hp 30 thou over, otherwise stock , just rebuilding heads now , with stainless inserts and valves and a little clean up. I have the gearbox serial numbers but not sure what it is , being new to corvettes. Same again for rear end other than knowing its a Posi.Before we tore it down for the vibration issue, I have found it difficult to get off the line in traffic conditions where you have to get moving quickly form a standing start, once under way it's great has really long legs.Anyone know how to check what the gearbox is by the numbers?. The whole car is matching numbers if that helps.
Cheers
Cheers
Le Mans Master
Joined: Nov 2008
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From: columbus oh
Melting Slicks
Joined: Apr 2010
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Like others have said, I wouldn’t go with a lighter than stock flywheel unless your engine has a ton of torque. I also suspect with a 300HP engine you have a wide ratio transmission.
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Thread Starter
Racer
Joined: Jan 2012
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From: Vic
thank you
Thread Starter
Racer
Joined: Jan 2012
Posts: 418
Likes: 1
From: Vic
I had to chuckle (not at you) when I read your post because of the memories it brought back. Back in the day (early 60’s) it was the rage to install light flywheels and lopey cams in our small block chevys. It was all about the sound when cruising the local hamburger stands. How lopey your idle was and how quickly your engine free-whined (rev’ed) was a status symbol. Any improvement in performance was purely coincidental.
Like others have said, I wouldn’t go with a lighter than stock flywheel unless your engine has a ton of torque. I also suspect with a 300HP engine you have a wide ratio transmission.
Like others have said, I wouldn’t go with a lighter than stock flywheel unless your engine has a ton of torque. I also suspect with a 300HP engine you have a wide ratio transmission.
